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Last name Frost (Frost , فراست , Фрост , among others...) , across the world, is a common family name. The cognomen Frost is habitual in Northern Europe, particularly Denmark, where it is quite a common surname, Isle of Man, and the United Kingdom (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Australia. Much less frequently, Frost is the forename as well as the last name.